f0cab81245
be 64 bits wide. The largest known current actual physical implementation is 40 bits, so BUS_SPACE_MAXADDR should reflect this. It also seems to me that BUS_SPACE_UNRESTRICTED should b ~0UL, not ~0.
515 lines
20 KiB
C
515 lines
20 KiB
C
/* $NetBSD: bus.h,v 1.12 1997/10/01 08:25:15 fvdl Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
|
|
* NASA Ames Research Center.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
|
|
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Christopher G. Demetriou
|
|
* for the NetBSD Project.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/* $FreeBSD$ */
|
|
|
|
#ifndef _ALPHA_BUS_H_
|
|
#define _ALPHA_BUS_H_
|
|
|
|
/*
|
|
* Bus address and size types
|
|
*/
|
|
typedef u_int64_t bus_addr_t;
|
|
typedef u_int64_t bus_size_t;
|
|
typedef struct alpha_busspace *bus_space_tag_t;
|
|
typedef u_int32_t bus_space_handle_t;
|
|
|
|
#define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF
|
|
#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
|
|
#define BUS_SPACE_MAXSIZE (64 * 1024) /* Maximum supported size */
|
|
#define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF
|
|
#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
|
|
/* The largest address space known so far is 40 bits */
|
|
#define BUS_SPACE_MAXADDR 0xFFFFFFFFFUL
|
|
|
|
#define BUS_SPACE_UNRESTRICTED (~0UL)
|
|
|
|
struct alpha_busspace;
|
|
|
|
struct alpha_busspace_ops {
|
|
u_int8_t (*abo_read_1)(struct alpha_busspace *space, size_t offset);
|
|
u_int16_t (*abo_read_2)(struct alpha_busspace *space, size_t offset);
|
|
u_int32_t (*abo_read_4)(struct alpha_busspace *space, size_t offset);
|
|
|
|
void (*abo_read_multi_1)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t *addr, size_t count);
|
|
void (*abo_read_multi_2)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t *addr, size_t count);
|
|
void (*abo_read_multi_4)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t *addr, size_t count);
|
|
|
|
void (*abo_read_region_1)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t *addr, size_t count);
|
|
void (*abo_read_region_2)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t *addr, size_t count);
|
|
void (*abo_read_region_4)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t *addr, size_t count);
|
|
|
|
void (*abo_write_1)(struct alpha_busspace *space, size_t offset,
|
|
u_int8_t value);
|
|
void (*abo_write_2)(struct alpha_busspace *space, size_t offset,
|
|
u_int16_t value);
|
|
void (*abo_write_4)(struct alpha_busspace *space, size_t offset,
|
|
u_int32_t value);
|
|
|
|
void (*abo_write_multi_1)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int8_t *addr, size_t count);
|
|
void (*abo_write_multi_2)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int16_t *addr, size_t count);
|
|
void (*abo_write_multi_4)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int32_t *addr, size_t count);
|
|
|
|
void (*abo_write_region_1)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int8_t *addr, size_t count);
|
|
void (*abo_write_region_2)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int16_t *addr, size_t count);
|
|
void (*abo_write_region_4)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int32_t *addr, size_t count);
|
|
|
|
void (*abo_set_multi_1)(struct alpha_busspace *space, size_t offset,
|
|
u_int8_t value, size_t count);
|
|
void (*abo_set_multi_2)(struct alpha_busspace *space, size_t offset,
|
|
u_int16_t value, size_t count);
|
|
void (*abo_set_multi_4)(struct alpha_busspace *space, size_t offset,
|
|
u_int32_t value, size_t count);
|
|
|
|
void (*abo_set_region_1)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t value, size_t count);
|
|
void (*abo_set_region_2)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t value, size_t count);
|
|
void (*abo_set_region_4)(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t value, size_t count);
|
|
|
|
void (*abo_copy_region_1)(struct alpha_busspace *space,
|
|
size_t offset1, size_t offset2,
|
|
size_t count);
|
|
void (*abo_copy_region_2)(struct alpha_busspace *space,
|
|
size_t offset1, size_t offset2,
|
|
size_t count);
|
|
void (*abo_copy_region_4)(struct alpha_busspace *space,
|
|
size_t offset1, size_t offset2,
|
|
size_t count);
|
|
|
|
void (*abo_barrier)(struct alpha_busspace *space, size_t offset,
|
|
size_t len, int flags);
|
|
};
|
|
|
|
struct alpha_busspace {
|
|
struct alpha_busspace_ops *ab_ops;
|
|
};
|
|
|
|
/* Back-compat functions for old ISA drivers */
|
|
|
|
extern struct alpha_busspace *busspace_isa_io;
|
|
extern struct alpha_busspace *busspace_isa_mem;
|
|
|
|
#define inb(o) bus_space_read_1(busspace_isa_io, o, 0)
|
|
#define inw(o) bus_space_read_2(busspace_isa_io, o, 0)
|
|
#define inl(o) bus_space_read_4(busspace_isa_io, o, 0)
|
|
#define outb(o, v) bus_space_write_1(busspace_isa_io, o, 0, v)
|
|
#define outw(o, v) bus_space_write_2(busspace_isa_io, o, 0, v)
|
|
#define outl(o, v) bus_space_write_4(busspace_isa_io, o, 0, v)
|
|
|
|
#define readb(o) bus_space_read_1(busspace_isa_mem, o, 0)
|
|
#define readw(o) bus_space_read_2(busspace_isa_mem, o, 0)
|
|
#define readl(o) bus_space_read_4(busspace_isa_mem, o, 0)
|
|
#define writeb(o, v) bus_space_write_1(busspace_isa_mem, o, 0, v)
|
|
#define writew(o, v) bus_space_write_2(busspace_isa_mem, o, 0, v)
|
|
#define writel(o, v) bus_space_write_4(busspace_isa_mem, o, 0, v)
|
|
|
|
#define insb(o, a, c) bus_space_read_multi_1(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
#define insw(o, a, c) bus_space_read_multi_2(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
#define insl(o, a, c) bus_space_read_multi_4(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
|
|
#define outsb(o, a, c) bus_space_write_multi_1(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
#define outsw(o, a, c) bus_space_write_multi_2(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
#define outsl(o, a, c) bus_space_write_multi_4(busspace_isa_io, o, 0, \
|
|
(void*)a, c)
|
|
|
|
#define memcpy_fromio(d, s, c) \
|
|
bus_space_read_region_1(busspace_isa_mem, s, 0, d, c)
|
|
#define memcpy_toio(d, s, c) \
|
|
bus_space_write_region_1(busspace_isa_mem, d, 0, s, c)
|
|
#define memcpy_io(d, s, c) \
|
|
bus_space_copy_region_1(busspace_isa_mem, s, 0, d, 0, c)
|
|
#define memset_io(d, v, c) \
|
|
bus_space_set_region_1(busspace_isa_mem, d, 0, v, c)
|
|
#define memsetw_io(d, v, c) \
|
|
bus_space_set_region_2(busspace_isa_mem, d, 0, v, c)
|
|
|
|
static __inline void
|
|
memsetw(void *d, int val, size_t size)
|
|
{
|
|
u_int16_t *sp = d;
|
|
|
|
while (size--)
|
|
*sp++ = val;
|
|
}
|
|
|
|
void busspace_generic_read_multi_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t *addr, size_t count);
|
|
void busspace_generic_read_multi_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t *addr, size_t count);
|
|
void busspace_generic_read_multi_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t *addr, size_t count);
|
|
void busspace_generic_read_region_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t *addr, size_t count);
|
|
void busspace_generic_read_region_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t *addr, size_t count);
|
|
void busspace_generic_read_region_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t *addr, size_t count);
|
|
void busspace_generic_write_multi_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int8_t *addr, size_t count);
|
|
void busspace_generic_write_multi_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int16_t *addr, size_t count);
|
|
void busspace_generic_write_multi_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int32_t *addr, size_t count);
|
|
void busspace_generic_write_region_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int8_t *addr, size_t count);
|
|
void busspace_generic_write_region_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int16_t *addr, size_t count);
|
|
void busspace_generic_write_region_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
const u_int32_t *addr, size_t count);
|
|
void busspace_generic_set_multi_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t value, size_t count);
|
|
void busspace_generic_set_multi_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t value, size_t count);
|
|
void busspace_generic_set_multi_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t value, size_t count);
|
|
void busspace_generic_set_region_1(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int8_t value, size_t count);
|
|
void busspace_generic_set_region_2(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int16_t value, size_t count);
|
|
void busspace_generic_set_region_4(struct alpha_busspace *space,
|
|
size_t offset,
|
|
u_int32_t value, size_t count);
|
|
void busspace_generic_copy_region_1(struct alpha_busspace *space,
|
|
size_t offset1,
|
|
size_t offset2,
|
|
size_t count);
|
|
void busspace_generic_copy_region_2(struct alpha_busspace *space,
|
|
size_t offset1,
|
|
size_t offset2,
|
|
size_t count);
|
|
void busspace_generic_copy_region_4(struct alpha_busspace *space,
|
|
size_t offset1,
|
|
size_t offset2,
|
|
size_t count);
|
|
void busspace_generic_barrier(struct alpha_busspace *space,
|
|
size_t offset, size_t len,
|
|
int flags);
|
|
|
|
#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
|
|
#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
|
|
|
|
#define bus_space_read_1(t, h, o) \
|
|
(t)->ab_ops->abo_read_1(t, (h)+(o))
|
|
#define bus_space_read_2(t, h, o) \
|
|
(t)->ab_ops->abo_read_2(t, (h)+(o))
|
|
#define bus_space_read_4(t, h, o) \
|
|
(t)->ab_ops->abo_read_4(t, (h)+(o))
|
|
#define bus_space_read_multi_1(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_multi_1(t, (h)+(o), a, c)
|
|
#define bus_space_read_multi_2(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_multi_2(t, (h)+(o), a, c)
|
|
#define bus_space_read_multi_4(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_multi_4(t, (h)+(o), a, c)
|
|
#define bus_space_read_region_1(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_region_1(t, (h)+(o), a, c)
|
|
#define bus_space_read_region_2(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_region_2(t, (h)+(o), a, c)
|
|
#define bus_space_read_region_4(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_read_region_4(t, (h)+(o), a, c)
|
|
|
|
#define bus_space_write_1(t, h, o, v) \
|
|
(t)->ab_ops->abo_write_1(t, (h)+(o), v)
|
|
#define bus_space_write_2(t, h, o, v) \
|
|
(t)->ab_ops->abo_write_2(t, (h)+(o), v)
|
|
#define bus_space_write_4(t, h, o, v) \
|
|
(t)->ab_ops->abo_write_4(t, (h)+(o), v)
|
|
#define bus_space_write_multi_1(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_multi_1(t, (h)+(o), a, c)
|
|
#define bus_space_write_multi_2(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_multi_2(t, (h)+(o), a, c)
|
|
#define bus_space_write_multi_4(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_multi_4(t, (h)+(o), a, c)
|
|
#define bus_space_write_region_1(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_region_1(t, (h)+(o), a, c)
|
|
#define bus_space_write_region_2(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_region_2(t, (h)+(o), a, c)
|
|
#define bus_space_write_region_4(t, h, o, a, c) \
|
|
(t)->ab_ops->abo_write_region_4(t, (h)+(o), a, c)
|
|
#define bus_space_set_multi_1(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_multi_1(t, (h)+(o), v, c)
|
|
#define bus_space_set_multi_2(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_multi_2(t, (h)+(o), v, c)
|
|
#define bus_space_set_multi_4(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_multi_4(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_1(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_1(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_2(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_2(t, (h)+(o), v, c)
|
|
#define bus_space_set_region_4(t, h, o, v, c) \
|
|
(t)->ab_ops->abo_set_region_4(t, (h)+(o), v, c)
|
|
|
|
#define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_1(t, (h1)+(o1), (h2)+(o2), c)
|
|
#define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_2(t, (h1)+(o1), (h2)+(o2), c)
|
|
#define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \
|
|
(t)->ab_ops->abo_copy_region_4(t, (h1)+(o1), (h2)+(o2), c)
|
|
|
|
#define bus_space_barrier(t, h, o, l, f) \
|
|
(t)->ab_ops->abo_barrier(t, (h)+(o), l, f)
|
|
|
|
/*
|
|
* Flags used in various bus DMA methods.
|
|
*/
|
|
#define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */
|
|
#define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */
|
|
#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
|
|
#define BUS_DMAMEM_NOSYNC 0x04 /* map memory to not require sync */
|
|
#define BUS_DMA_ISA 0x10 /* map memory for ISA dma */
|
|
#define BUS_DMA_BUS2 0x20 /* placeholders for bus functions... */
|
|
#define BUS_DMA_BUS3 0x40
|
|
#define BUS_DMA_BUS4 0x80
|
|
|
|
/* Forwards needed by prototypes below. */
|
|
struct mbuf;
|
|
struct uio;
|
|
|
|
/*
|
|
* bus_dmasync_op_t
|
|
*
|
|
* Operations performed by bus_dmamap_sync().
|
|
*/
|
|
typedef enum {
|
|
BUS_DMASYNC_PREREAD,
|
|
BUS_DMASYNC_POSTREAD,
|
|
BUS_DMASYNC_PREWRITE,
|
|
BUS_DMASYNC_POSTWRITE
|
|
} bus_dmasync_op_t;
|
|
|
|
/*
|
|
* bus_dma_tag_t
|
|
*
|
|
* A machine-dependent opaque type describing the characteristics
|
|
* of how to perform DMA mappings. This structure encapsultes
|
|
* information concerning address and alignment restrictions, number
|
|
* of S/G segments, amount of data per S/G segment, etc.
|
|
*/
|
|
typedef struct bus_dma_tag *bus_dma_tag_t;
|
|
|
|
/*
|
|
* bus_dmamap_t
|
|
*
|
|
* DMA mapping instance information.
|
|
*/
|
|
typedef struct bus_dmamap *bus_dmamap_t;
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
typedef struct bus_dma_segment {
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
} bus_dma_segment_t;
|
|
|
|
/*
|
|
* A function that returns 1 if the address cannot be accessed by
|
|
* a device and 0 if it can be.
|
|
*/
|
|
typedef int bus_dma_filter_t(void *, bus_addr_t);
|
|
|
|
/*
|
|
* Allocate a device specific dma_tag encapsulating the constraints of
|
|
* the parent tag in addition to other restrictions specified:
|
|
*
|
|
* alignment: alignment for segments.
|
|
* boundary: Boundary that segments cannot cross.
|
|
* lowaddr: Low restricted address that cannot appear in a mapping.
|
|
* highaddr: High restricted address that cannot appear in a mapping.
|
|
* filtfunc: An optional function to further test if an address
|
|
* within the range of lowaddr and highaddr cannot appear
|
|
* in a mapping.
|
|
* filtfuncarg: An argument that will be passed to filtfunc in addition
|
|
* to the address to test.
|
|
* maxsize: Maximum mapping size supported by this tag.
|
|
* nsegments: Number of discontinuities allowed in maps.
|
|
* maxsegsz: Maximum size of a segment in the map.
|
|
* flags: Bus DMA flags.
|
|
* dmat: A pointer to set to a valid dma tag should the return
|
|
* value of this function indicate success.
|
|
*/
|
|
/* XXX Should probably allow specification of alignment */
|
|
int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignemnt,
|
|
bus_size_t boundary, bus_addr_t lowaddr,
|
|
bus_addr_t highaddr, bus_dma_filter_t *filtfunc,
|
|
void *filtfuncarg, bus_size_t maxsize, int nsegments,
|
|
bus_size_t maxsegsz, int flags, bus_dma_tag_t *dmat);
|
|
|
|
int bus_dma_tag_destroy(bus_dma_tag_t dmat);
|
|
|
|
/*
|
|
* Allocate a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Destroy a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
|
|
/*
|
|
* Allocate a piece of memory that can be efficiently mapped into
|
|
* bus device space based on the constraints lited in the dma tag.
|
|
* A dmamap to for use with dmamap_load is also allocated.
|
|
*/
|
|
int bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
|
|
bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Free a piece of memory and it's allociated dmamap, that was allocated
|
|
* via bus_dmamem_alloc.
|
|
*/
|
|
void bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
|
|
|
|
/*
|
|
* A function that processes a successfully loaded dma map or an error
|
|
* from a delayed load map.
|
|
*/
|
|
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
|
|
|
|
/*
|
|
* Map the buffer buf into bus space using the dmamap map.
|
|
*/
|
|
int bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
|
|
bus_size_t buflen, bus_dmamap_callback_t *callback,
|
|
void *callback_arg, int flags);
|
|
|
|
/*
|
|
* Perform a syncronization operation on the given map.
|
|
*/
|
|
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
|
|
#define bus_dmamap_sync(dmat, dmamap, op) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_sync(dmat, dmamap, op)
|
|
|
|
/*
|
|
* Release the mapping held by map.
|
|
*/
|
|
void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
#define bus_dmamap_unload(dmat, dmamap) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_unload(dmat, dmamap)
|
|
|
|
#endif /* _ALPHA_BUS_H_ */
|